EP4141259A1 - Capacity control valve - Google Patents
Capacity control valve Download PDFInfo
- Publication number
- EP4141259A1 EP4141259A1 EP21792456.2A EP21792456A EP4141259A1 EP 4141259 A1 EP4141259 A1 EP 4141259A1 EP 21792456 A EP21792456 A EP 21792456A EP 4141259 A1 EP4141259 A1 EP 4141259A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure sensitive
- valve
- valve body
- slide
- port
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- 239000012530 fluid Substances 0.000 claims abstract description 54
- 238000004891 communication Methods 0.000 claims abstract description 37
- 230000002093 peripheral effect Effects 0.000 claims description 33
- 238000006073 displacement reaction Methods 0.000 description 35
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 17
- 238000004378 air conditioning Methods 0.000 description 7
- 239000003507 refrigerant Substances 0.000 description 7
- 230000004323 axial length Effects 0.000 description 5
- 230000004043 responsiveness Effects 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- 238000005192 partition Methods 0.000 description 4
- 230000000149 penetrating effect Effects 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
- F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
- F04B27/10—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
- F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
- F04B27/14—Control
- F04B27/16—Control of pumps with stationary cylinders
- F04B27/18—Control of pumps with stationary cylinders by varying the relative positions of a swash plate and a cylinder block
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
- F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
- F04B27/14—Control
- F04B27/16—Control of pumps with stationary cylinders
- F04B27/18—Control of pumps with stationary cylinders by varying the relative positions of a swash plate and a cylinder block
- F04B27/1804—Controlled by crankcase pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/10—Valves; Arrangement of valves
- F04B53/108—Valves characterised by the material
- F04B53/1082—Valves characterised by the material magnetic
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/10—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit
- F16K11/20—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit operated by separate actuating members
- F16K11/22—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit operated by separate actuating members with an actuating member for each valve, e.g. interconnected to form multiple-way valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/10—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit
- F16K11/20—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit operated by separate actuating members
- F16K11/24—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit operated by separate actuating members with an electromagnetically-operated valve, e.g. for washing machines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K15/00—Check valves
- F16K15/18—Check valves with actuating mechanism; Combined check valves and actuated valves
- F16K15/184—Combined check valves and actuated valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0644—One-way valve
- F16K31/0668—Sliding valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
- F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
- F04B27/14—Control
- F04B27/16—Control of pumps with stationary cylinders
- F04B27/18—Control of pumps with stationary cylinders by varying the relative positions of a swash plate and a cylinder block
- F04B27/1804—Controlled by crankcase pressure
- F04B2027/1822—Valve-controlled fluid connection
- F04B2027/1827—Valve-controlled fluid connection between crankcase and discharge chamber
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
- F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
- F04B27/14—Control
- F04B27/16—Control of pumps with stationary cylinders
- F04B27/18—Control of pumps with stationary cylinders by varying the relative positions of a swash plate and a cylinder block
- F04B27/1804—Controlled by crankcase pressure
- F04B2027/1822—Valve-controlled fluid connection
- F04B2027/1831—Valve-controlled fluid connection between crankcase and suction chamber
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
- F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
- F04B27/14—Control
- F04B27/16—Control of pumps with stationary cylinders
- F04B27/18—Control of pumps with stationary cylinders by varying the relative positions of a swash plate and a cylinder block
- F04B27/1804—Controlled by crankcase pressure
- F04B2027/184—Valve controlling parameter
- F04B2027/1845—Crankcase pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
- F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
- F04B27/14—Control
- F04B27/16—Control of pumps with stationary cylinders
- F04B27/18—Control of pumps with stationary cylinders by varying the relative positions of a swash plate and a cylinder block
- F04B27/1804—Controlled by crankcase pressure
- F04B2027/1863—Controlled by crankcase pressure with an auxiliary valve, controlled by
- F04B2027/1868—Crankcase pressure
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
Description
- The present invention relates to a capacity control valve that variably controls capacity of a working fluid, for example, to a capacity control valve that controls a discharge amount of a variable displacement compressor used for an air conditioning system of an automobile according to pressure.
- A variable displacement compressor used for an air conditioning system of an automobile, etc. includes a rotating shaft to be driven and rotated by an engine, a swash plate coupled to the rotating shaft in such a manner that a tilt angle is variable, compressing pistons coupled to the swash plate, etc., and by changing the tilt angle of the swash plate, changes a stroke amount of the pistons to control a discharge amount of fluid. This tilt angle of the swash plate can be continuously changed by appropriately controlling pressure in a control chamber while utilizing a suction pressure Ps of a suction chamber that suctions the fluid, a discharge pressure Pd of a discharge chamber that discharges the fluid pressurized by the pistons, and a control pressure Pc of the control chamber that houses the swash plate, by means of a capacity control valve to be driven to open and close by electromagnetic force.
- At the time of continuously driving the variable displacement compressor, the capacity control valve performs normal control in which energization is controlled by a control computer, a valve body is moved in an axial direction by electromagnetic force generated in a solenoid, and a main valve provided between a discharge port through which a discharge fluid of the discharge pressure Pd passes and a control port through which a control fluid of the control pressure Pc passes is opened and closed to adjust the control pressure Pc of the control chamber of the variable displacement compressor.
- During normal control of the capacity control valve, the pressure of the control chamber in the variable displacement compressor is appropriately controlled, and the tilt angle of the swash plate with respect to the rotating shaft is continuously changed to change the stroke amount of the pistons and to control the amount of discharge of the fluid to the discharge chamber, so that the air conditioning system is adjusted to have a target cooling capacity. In addition, when the variable displacement compressor is driven at the maximum capacity, the main valve of the capacity control valve is closed to lower the pressure of the control chamber, so that the tilt angle of the swash plate is maximized.
- In addition, a configuration has been known in which an auxiliary communication passage is formed that provides communication between a control port and a suction port of a capacity control valve, and a refrigerant of a control chamber of a variable displacement compressor is discharged to a suction chamber of the variable displacement compressor through the control port, the auxiliary communication passage, and the suction port at a start-up, to rapidly lower the pressure of the control chamber at the start-up, so that the responsiveness of the variable displacement compressor is improved (refer to Patent Citation 1).
- Patent Citation 1:
JP 5167121 B2 PAGE 7 andFIG. 2 ) - However, according to the configuration disclosed in Patent Citation 1, a fluid discharge function at a start-up is good, but at the time of continuously driving the variable displacement compressor, the auxiliary communication passage allows communication, and the refrigerant flows from the control port into the suction port, so that the refrigerant circulation amount increases and the operating efficiency of the variable displacement compressor decreases, which is a problem.
- The present invention is conceived in view of such a problem, and an object of the present invention is to provide a capacity control valve having a fluid discharge function at a start-up and having good operating efficiency.
- In order to solve the foregoing problem, according to the present invention, there is provided a capacity control valve including: a valve housing provided with a discharge port through which a discharge fluid of a discharge pressure passes, a suction port through which a suction fluid of a suction pressure passes, and a control port through which a control fluid of a control pressure passes; a main valve including a valve body driven by a solenoid, and a main valve seat which is provided between the discharge port and the control port and with which the valve body is contactable; a pressure sensitive body disposed in a pressure sensitive chamber; and a pressure sensitive valve member extending from the valve body to the pressure sensitive chamber and forming a pressure sensitive valve, together with the pressure sensitive body. An intermediate communication passage is formed in the valve body and in the pressure sensitive valve member, and the control port and the suction port are allowed to communicate with each other through the intermediate communication passage by opening the pressure sensitive valve. The pressure sensitive valve member is provided with a through-hole communicating with the intermediate communication passage and has a slide valve body attached thereto such that the slide valve body slides relative to the pressure sensitive valve member to open and close the through-hole. A biasing device that biases the slide valve body in an opening direction is provided on a radially outer side of the slide valve body. According to the aforesaid feature of the present invention, when the main valve is closed at a start-up and in a maximum energized state, the slide valve body is reliably slid by a biasing force of the biasing device to open the through-hole and to provide communication between the control port and the suction port, so that the control pressure can be quickly lowered. On the other hand, when the main valve is controlled in an energized state, the slide valve body is slid by a fluid flowing due to opening of the main valve, to close the through-hole and to shut off communication between the control port and the suction port, so that the fluid can be prevented from flowing into the suction port from the control port. In such a manner, the discharge of a liquid refrigerant and the operating efficiency at a start-up of the variable displacement compressor can be improved.
- It may be preferable that the biasing device is disposed between the slide valve body and a support portion formed closer to a tip side than the through-hole in the pressure sensitive valve member. According to this preferable configuration, the biasing device and the through-hole of the pressure sensitive valve member can be disposed at a position to overlap each other in a radial direction, so that the axial length of each of the slide valve body and the pressure sensitive valve member can be shortened, and the capacity control valve can be compactly configured.
- It may be preferable that the biasing device is disposed so as to be exposed to the pressure sensitive chamber. According to this preferable configuration, it is difficult for the biasing device to be affected by the pressure of the fluid which is involved in opening and closing of the through-hole by the slide valve body, so that the responsiveness of the biasing device is good.
- It may be preferable that an inner peripheral surface of the slide valve body is formed as a flush surface. According to this preferable configuration, the slidability of the slide valve body on the pressure sensitive valve member can be enhanced, and the amount of the fluid leaking to the intermediate communication passage through a very small gap between an inner peripheral surface of the slide valve body and an outer peripheral surface of the pressure sensitive valve member can be reduced, so that the operating efficiency of the variable displacement compressor can be further improved.
- It may be preferable that a receiving surface facing toward the main valve side is formed in the slide valve body. According to this preferable configuration, the slide valve body is easily actuated by the fluid flowing due to opening of the main valve.
- It may be preferable that the receiving surface is tilted with respect to a reciprocating direction of the valve body. According to this preferable configuration, the fluid easily flows from the discharge port to the control port due to opening of the main valve.
- It may be preferable that the slide valve body is disposed to be strokable in a closed state of the through-hole. According this preferable configuration, since the through-hole is in a closed state until the slide valve body slides by a predetermined distance or more, the closed state of the through-hole can be maintained even when the slide valve body slightly slides due to disturbance such as vibration. As described above, the capacity control valve is resistant to disturbance, and has good control accuracy.
- It may be preferable that the valve body and the pressure sensitive valve member are separate bodies, and a stopper portion that restricts a movement of the slide valve body toward the main valve is formed in the valve body. According to this preferable configuration, the sliding of the slide valve body can be restricted with a simple structure.
- It may be preferable that a plurality of the through-holes are formed in the pressure sensitive valve member. According to this preferable configuration, a wide cross-sectional area of a flow passage can be secured.
-
-
FIG. 1 is a schematic configuration view showing a swash plate-type variable displacement compressor into which a capacity control valve according to an embodiment of the present invention is assembled. -
FIG. 2 is a cross-sectional view showing a state where a main valve is opened and a through-hole of a pressure sensitive valve member is closed by a slide valve body in a non-energized state of the capacity control valve of the embodiment. -
FIG. 3 is an enlarged cross-sectional view ofFIG. 2 showing a state where the main valve is opened and the through-hole of the pressure sensitive valve member is closed by the slide valve body in a non-energized state of the capacity control valve of the embodiment. -
FIG. 4 is an enlarged cross-sectional view showing a state where the main valve is closed and the slide valve body is moved to open the through-hole of the pressure sensitive valve member in an energized state of the capacity control valve of the embodiment. -
FIG. 5 is an enlarged cross-sectional view showing a modification example of the capacity control valve of the embodiment. - Modes for carrying out a capacity control valve according to the present invention will be described below based on an embodiment.
- A capacity control valve according to an embodiment of the present invention will be described with reference to
FIGS. 1 to 4 . Hereinafter, a description will be given based on the assumption that the left and right sides when seen from the front side ofFIG. 2 are left and right sides of the capacity control valve. In detail, a description will be given based on the assumption that the left side of the drawing sheet on which a pressuresensitive body 60 is disposed is the left side of the capacity control valve and the right side of the drawing sheet on which asolenoid 80 is disposed is the right side of the capacity control valve. - A capacity control valve V of the present invention is assembled into a variable displacement compressor M used for an air conditioning system of an automobile, etc., and by variably controlling the pressure of a working fluid (hereinafter, simply referred to as a "fluid") that is a refrigerant, controls the discharge amount of the variable displacement compressor M to adjust the air conditioning system to have a target cooling capacity.
- First, the variable displacement compressor M will be described. As shown in
FIG. 1 , the variable displacement compressor M includes a casing 1 including adischarge chamber 2, a suction chamber 3, a control chamber 4, and a plurality ofcylinders 4a. Incidentally, the variable displacement compressor M is provided with a communication passage (not shown) that provides direct communication between the control chamber 4 and the suction chamber 3, and the communication passage is provided with a fixed orifice that adjusts and balances pressure between the suction chamber 3 and the control chamber 4. - In addition, the variable displacement compressor M includes a rotating shaft 5 to be driven and rotated by an engine (not shown) installed outside the casing 1; a
swash plate 6 coupled to the rotating shaft 5 so as to be tiltable by a hinge mechanism 8 in the control chamber 4; and a plurality ofpistons 7 that are coupled to theswash plate 6 and that are reciprocatably fitted in therespective cylinders 4a, and appropriately controls pressure in the control chamber 4 while utilizing a suction pressure Ps of the suction chamber 3 that suctions the fluid, a discharge pressure Pd of thedischarge chamber 2 that discharges the fluid pressurized by thepistons 7, and a control pressure Pc of the control chamber 4 that houses theswash plate 6, by means of a capacity control valve V to be driven to open and close by electromagnetic force, to continuously change the tilt angle of theswash plate 6, and thus to change the stroke amount of thepistons 7 and to control the discharge amount of the fluid. Incidentally, for convenience of description, the capacity control valve V assembled into the variable displacement compressor M is not shown inFIG. 1 . - Specifically, the higher the control pressure Pc in the control chamber 4 is, the smaller the tilt angle of the
swash plate 6 with respect to the rotating shaft 5 is to reduce the stroke amount of thepistons 7, and when the control pressure Pc reaches a certain pressure or higher, theswash plate 6 is substantially perpendicular to the rotating shaft 5, namely, slightly tilted from perpendicularity. At this time, since the stroke amount of thepistons 7 is minimized and the pressurization of the fluid in thecylinders 4a by thepistons 7 is minimized, the amount of discharge of the fluid to thedischarge chamber 2 is reduced, and the cooling capacity of the air conditioning system is minimized. On the other hand, the lower the control pressure Pc in the control chamber 4 is, the larger the tilt angle of theswash plate 6 with respect to the rotating shaft 5 is to increase the stroke amount of thepistons 7, and when the control pressure Pc reaches a certain pressure or lower, theswash plate 6 has a maximum tilt angle with respect to the rotating shaft 5. At this time, since the stroke amount of thepistons 7 is maximized and the pressurization of the fluid in thecylinders 4a by thepistons 7 is maximized, the amount of discharge of the fluid to thedischarge chamber 2 is increased, and the cooling capacity of the air conditioning system is maximized. - As shown in
FIG. 2 , the capacity control valve V assembled into the variable displacement compressor M controls an electric current that energizes acoil 86 forming thesolenoid 80, to perform opening and closing control of amain valve 50 and anauxiliary valve 54 in the capacity control valve V, and performs opening and closing control of a pressuresensitive valve 53 using the suction pressure Ps to control the fluid flowing into the control chamber 4 or flowing out from the control chamber 4, thereby variably controlling the control pressure Pc in the control chamber 4. - In the present embodiment, the
main valve 50 includes a main andauxiliary valve body 51 serving as a valve body and amain valve seat 10a that is formed at anannular protrusion portion 10c having an isosceles trapezoidal shape in a cross-sectional view and protruding from an inner peripheral surface of avalve housing 10 to a radially inner side, and an axiallyleft end 51a of the main andauxiliary valve body 51 comes into contact with and separates from themain valve seat 10a to open and close themain valve 50. Theauxiliary valve 54 includes the main andauxiliary valve body 51 and an auxiliary valve seat 82a formed in an opening end surface of a fixediron core 82, namely, in an axially left end surface of the fixediron core 82, and astep portion 51b on an axially right side of the main andauxiliary valve body 51 comes into contact with and separates from the auxiliary valve seat 82a to open and close theauxiliary valve 54. The pressuresensitive valve 53 includes anadapter 70 of the pressuresensitive body 60 and a pressuresensitive valve seat 52a formed at an axially left end of a pressuresensitive valve member 52, and an axiallyright end 70a of theadapter 70 comes into contact with and separates from the pressuresensitive valve seat 52a to open and close the pressuresensitive valve 53. - Next, a structure of the capacity control valve V will be described. As illustrated in
FIG. 2 , the capacity control valve V mainly includes thevalve housing 10 made of a metallic material or a resin material; the main andauxiliary valve body 51 and the pressuresensitive valve member 52 disposed inside thevalve housing 10 so as to be reciprocatable in an axial direction; the pressuresensitive body 60 that applies a biasing force to the main andauxiliary valve body 51 and to the pressuresensitive valve member 52 to the right in the axial direction according to the suction pressure Ps; thesolenoid 80 connected to thevalve housing 10 to exert a driving force on the main andauxiliary valve body 51 and the pressuresensitive valve member 52; and aslide valve body 90 provided to be reciprocatable relative to the pressuresensitive valve member 52 in the axial direction by a flow of the fluid generated by opening of themain valve 50. Since theslide valve body 90 opens and closes a flow passage between anauxiliary valve chamber 30 and a pressuresensitive chamber 40 that have the suction pressure Ps and the control pressure Pc, respectively, when theslide valve body 90 reciprocates, it can be said that theslide valve body 90 forms a CS valve, together with the pressuresensitive valve member 52, the CS valve rapidly releasing the control pressure Pc of the control chamber 4 to the suction chamber 3 through a through-hole 52d of the pressuresensitive valve member 52 and through anintermediate communication passage 55 to be described later. - As illustrated in
FIG. 2 , thesolenoid 80 mainly includes acasing 81 including anopening portion 81a that is open to the left in the axial direction; the fixediron core 82 having a substantially cylindrical shape and being inserted into theopening portion 81a of thecasing 81 from the left in the axial direction to be fixed to an radially inner side of thecasing 81; adrive rod 83 which is reciprocatable in the axial direction on the radially inner side of the fixediron core 82 and of which an axially left end portion is connected and fixed to the main andauxiliary valve body 51; amovable iron core 84 firmly fixed to an axially right end portion of thedrive rod 83; acoil spring 85 provided between the fixediron core 82 and themovable iron core 84 to bias themovable iron core 84 to the right in the axial direction; and acoil 86 for excitation wound on an outer side of the fixediron core 82 with a bobbin interposed therebetween. - A radially inner side of an axially left end of the
casing 81 is recessed to the right in the axial direction to form a recessedportion 81b, and an axially right end portion of thevalve housing 10 is inserted and fixed to the recessedportion 81b in a substantially sealed state. - The fixed
iron core 82 is made of a rigid body that is a magnetic material such as iron or silicon steel, and includes acylindrical portion 82b which extends in the axial direction and in which aninsertion hole 82c into which thedrive rod 83 is inserted is formed, and aflange portion 82d having an annular shape and extending from an outer peripheral surface of an axially left end portion of thecylindrical portion 82b in a radially outward direction, and a radially inner side of an axially left end of thecylindrical portion 82b is recessed to the right in the axial direction to form a recessedportion 82e. - As illustrate in
FIG. 2 , aPd port 12 that is a discharge port communicating with thedischarge chamber 2 of the variable displacement compressor M, aPs port 13 that is a suction port communicating with the suction chamber 3 of the variable displacement compressor M, and aPc port 14 that is a control port communicating with the control chamber 4 of the variable displacement compressor M are formed in thevalve housing 10. - A
partition adjustment member 11 is press-fitted into an axially left end portion of thevalve housing 10 in a substantially sealed state, so that thevalve housing 10 has a substantially bottomed cylindrical shape. Incidentally, thepartition adjustment member 11 can adjust the installation position of thevalve housing 10 in the axial direction to adjust a biasing force of the pressuresensitive body 60. - A
main valve chamber 20 which communicates with thePd port 12 and in which an axiallyleft end 51a side of the main andauxiliary valve body 51 is disposed, theauxiliary valve chamber 30 which communicates with thePs port 13 and in which a back pressure side of the main andauxiliary valve body 51, namely, thestep portion 51b on the axially right side of the main andauxiliary valve body 51 is disposed, and the pressuresensitive chamber 40 which communicates with thePc port 14 and in which the pressuresensitive valve member 52, theslide valve body 90, and the pressuresensitive body 60 are disposed are formed inside thevalve housing 10. - In addition, the main and
auxiliary valve body 51 and the pressuresensitive valve member 52 inserted and fixed to the main andauxiliary valve body 51 are disposed inside thevalve housing 10 so as to be reciprocatable in the axial direction, and aguide hole 10b which has a small diameter and with which an outer peripheral surface of the main andauxiliary valve body 51 is in slidable contact in a substantially sealed state is formed at an axially right end portion of the inner peripheral surface of thevalve housing 10. Further, inside thevalve housing 10, themain valve chamber 20 and theauxiliary valve chamber 30 are partitioned off by the outer peripheral surface of the main andauxiliary valve body 51 and an inner peripheral surface of theguide hole 10b. Incidentally, the inner peripheral surface of theguide hole 10b and the outer peripheral surface of the main andauxiliary valve body 51 are slightly separated from each other in a radial direction to form a very small gap therebetween, and the main andauxiliary valve body 51 is smoothly movable relative to thevalve housing 10 in the axial direction. - As illustrated in
FIG. 2 , the pressuresensitive body 60 mainly includes a bellows core 61 in which a coil spring 62 is built-in, and theadapter 70 provided at an axially right end portion of the bellows core 61, and an axially left end of the bellows core 61 is fixed to thepartition adjustment member 11. - In addition, the pressure
sensitive body 60 is disposed in the pressuresensitive chamber 40, and the axiallyright end 70a of theadapter 70 is seated on the pressuresensitive valve seat 52a of the pressuresensitive valve member 52 by a biasing force to move theadapter 70 to the right in the axial direction that is applied by the coil spring 62 and the bellows core 61. In addition, a force to the left in the axial direction is applied to theadapter 70 according to the suction pressure Ps in theintermediate communication passage 55. - As illustrated in
FIG. 2 , the main andauxiliary valve body 51 is formed in a substantially cylindrical shape. The pressuresensitive valve member 52 that is separately formed in a flanged cylindrical shape and in a substantially turret shape in a side view is inserted and fixed to an axially left end portion of the main andauxiliary valve body 51 in a substantially sealed state, and thedrive rod 83 is inserted and fixed to an axially right end portion of the main andauxiliary valve body 51 in a substantially sealed state. The main andauxiliary valve body 51, the pressuresensitive valve member 52, and thedrive rod 83 are movable together in the axial direction. - In addition, since the labyrinth effect of annular grooves formed in the outer peripheral surface of the main and
auxiliary valve body 51 can suppress the leakage of the fluid from themain valve chamber 20 to theauxiliary valve chamber 30, the discharge pressure Pd of the discharge fluid supplied from thedischarge chamber 2 to themain valve chamber 20 via thePd port 12 is maintained. - Incidentally, hollow holes inside the main and
auxiliary valve body 51 and inside the pressuresensitive valve member 52 are connected to each other to form theintermediate communication passage 55 penetrating therethrough in the axial direction. Incidentally, theintermediate communication passage 55 communicates with theauxiliary valve chamber 30 via a plurality of through-holes 51c penetrating through the axially right end portion of the main andauxiliary valve body 51 in the radial direction. - As shown in
FIGS. 2 to 4 , the pressuresensitive valve member 52 is formed in a flanged cylindrical shape and in a substantially turret shape in a side view, and includes abase portion 52b having a cylindrical shape of which an axially right end portion is inserted and fixed to the main andauxiliary valve body 51 in a substantially sealed state and to which theslide valve body 90 is externally fitted, and aflange portion 52c that is a support portion which extends from an outer peripheral surface of an axially left end portion of thebase portion 52b in the radially outward direction and in which the pressuresensitive valve seat 52a that comes into contact with and separates from the axiallyright end 70a of theadapter 70 is formed. Incidentally, a plurality of the through-holes 52d penetrating through thebase portion 52b in the radial direction and communicating with theintermediate communication passage 55 are formed at the axially left end portion of thebase portion 52b. - As shown in
FIGS. 2 to 4 , theslide valve body 90 is formed in a flanged cylindrical shape, and includes abase portion 90a having a cylindrical shape and being externally fitted to thebase portion 52b of the pressuresensitive valve member 52, and aflange portion 90b extending from an outer peripheral surface of a substantially axially center portion of thebase portion 90a in the radially outward direction. Theslide valve body 90 is biased toward the right in the axial direction by acoil spring 91 that is a biasing device provided on a radially outer side of theslide valve body 90. - A side surface on an axially right side of the
flange portion 90b faces the right in the axial direction where themain valve 50 is formed, and is a receivingsurface 90c that is tilted with respect to a reciprocating direction of the main andauxiliary valve body 51 and of theslide valve body 90. Incidentally, the tilt of the receivingsurface 90c having a linear shape in a side view has been described as an example, but is not limited to the example and may have, for example, a curved shape in a side view. - In addition, an inner side of the
slide valve body 90, namely, an inner peripheral surface of thebase portion 90a is formed as a flush surface. Incidentally, the inner peripheral surface of thebase portion 90a and an outer peripheral surface of thebase portion 52b of the pressuresensitive valve member 52 are slightly separated from each other in the radial direction to form a very small gap, and theslide valve body 90 is smoothly movable relative to the pressuresensitive valve member 52 in the axial direction. - In addition, an
end surface portion 90d is formed at an axially right end of theslide valve body 90, namely, at an axially right end of thebase portion 90a, theend surface portion 90d coming into contact with astopper portion 51d formed on a radially inner side of the axially left end of the main andauxiliary valve body 51 when theslide valve body 90 moves to the right in the axial direction to open the through-holes 52d of the pressure sensitive valve member 52 (refer toFIG. 4 ). In addition, anend surface portion 90e is formed at an axially left end of theslide valve body 90, namely, at an axially left end of thebase portion 90a, theend surface portion 90e being capable of coming into contact with aside surface 52e on an axially right side of theflange portion 52c of the pressuresensitive valve member 52 when theslide valve body 90 moves to the left in the axial direction to close the through-holes 52d of the pressure sensitive valve member 52 (refer toFIGS. 2 and3 ). Accordingly, an axial position of theslide valve body 90 when the through-holes 52d of the pressuresensitive valve member 52 are opened and closed by the axially left end portion of thebase portion 90a of theslide valve body 90 is determined. - Incidentally, the through-
holes 52d of the pressuresensitive valve member 52 are formed on an axially right side of theside surface 52e on the axially right side of theflange portion 52c, and until theend surface portion 90e formed at the axially left end of thebase portion 90a of theslide valve body 90 moves to the axial position of axially left opening ends of the through-holes 52d from a state where theend surface portion 90e is in contact with theside surface 52e of theflange portion 52c of the pressuresensitive valve member 52, a state where the axially left end portion of thebase portion 90a of theslide valve body 90 overlaps the through-holes 52d in the radial direction and closes the through-holes 52d is maintained. - As shown in
FIGS. 2 to 4 , an axially left end of thecoil spring 91 is in contact with theside surface 52e on the axially right side of theflange portion 52c of the pressuresensitive valve member 52, and an axially right end of thecoil spring 91 is in contact with aside surface 90f on an axially left side of theflange portion 90b of theslide valve body 90 that is externally fitted to thebase portion 52b of the pressuresensitive valve member 52, and thecoil spring 91 biases theslide valve body 90 to the right in the axial direction toward thestopper portion 51d of the main andauxiliary valve body 51. - Incidentally, the
coil spring 91 is a compression spring, and an inner periphery of thecoil spring 91 is slightly separated from an outer peripheral surface of thebase portion 90a of theslide valve body 90 in the radial direction. Incidentally, the inner periphery of thecoil spring 91 may be guided by the outer peripheral surface of thebase portion 90a of theslide valve body 90. - Next, operation of the capacity control valve V, mainly operation of an opening and closing mechanism of the through-
holes 52d of the pressuresensitive valve member 52 performed by theslide valve body 90 will be described in order of at a start-up and during normal control. - First, the operation at a start-up will be described. After the variable displacement compressor M is left without being used for a long time, the discharge pressure Pd, the control pressure Pc, and the suction pressure Ps are substantially in equilibrium. Incidentally, although not shown for convenience of description, the fluid of high pressure in the control chamber 4 may be liquefied when the variable displacement compressor M is left in a stopped state for a long time, and at this time, due to the suction pressure Ps being high in the
intermediate communication passage 55, the pressuresensitive body 60 is contracted and actuated to separate the axiallyright end 70a of theadapter 70 from the pressuresensitive valve seat 52a of the pressuresensitive valve member 52, so that the pressuresensitive valve 53 is opened. As described above, for example, when the suction pressure Ps is high at a start-up, the liquid refrigerant in the control chamber 4 can be discharged to the suction chamber 3 via theintermediate communication passage 55 in a short time by opening of the pressuresensitive valve 53. - In a non-energized state of the capacity control valve V, the
movable iron core 84 is pressed to the right in the axial direction by a biasing force of thecoil spring 85 forming thesolenoid 80 or by the biasing force of the coil spring 62 and of the bellows core 61 that form the pressuresensitive body 60, to move thedrive rod 83, the main andauxiliary valve body 51, and the pressuresensitive valve member 52 to the right in the axial direction, so that thestep portion 51b on the axially right side of the main andauxiliary valve body 51 is seated on the auxiliary valve seat 82a of the fixediron core 82 to close theauxiliary valve 54, and the axiallyleft end 51a of the main andauxiliary valve body 51 separates from themain valve seat 10a formed in the inner peripheral surface of thevalve housing 10, to open the main valve 50 (refer toFIG. 2 ). At this time, theslide valve body 90 is located at the left in the axial direction to close the through-holes 52d of the pressuresensitive valve member 52. - Due to electromagnetic force generated by the application of an electric current to the
solenoid 80 when the variable displacement compressor M is started up and the capacity control valve V is energized, themovable iron core 84 is pulled to the axially left side toward the fixediron core 82, thedrive rod 83 fixed to themovable iron core 84, the main andauxiliary valve body 51, and the pressuresensitive valve member 52 move together to the left in the axial direction, and the pressuresensitive body 60 is pressed and contracted to the left in the axial direction, so that thestep portion 51b on the axially right side of the main andauxiliary valve body 51 separates from the auxiliary valve seat 82a to open theauxiliary valve 54, and the axiallyleft end 51a of the main andauxiliary valve body 51 is seated on themain valve seat 10a to close the main valve 50 (refer toFIG. 4 ). At this time, theslide valve body 90 is reliably moved to the right in the axial direction by the biasing force of thecoil spring 91, to open the through-holes 52d of the pressuresensitive valve member 52. - As described above, when the
slide valve body 90 opens the through-holes 52d of the pressuresensitive valve member 52 at a start-up, the pressuresensitive chamber 40 communicates with theintermediate communication passage 55 via the through-holes 52d and the fluid flows (shown by solid arrows inFIG. 4 ). Namely, since theslide valve body 90 opens the through-holes 52d of the pressuresensitive valve member 52 to form a flow passage for the discharge of the fluid in order of the control chamber 4, thePc port 14, the pressuresensitive chamber 40, the through-holes 52d, theintermediate communication passage 55, theauxiliary valve chamber 30, thePs port 13, and the suction chamber 3, the liquefied fluid of the control chamber 4 can be discharged in a short time to improve responsiveness at a start-up. In addition, for example, as described above, even when the pressuresensitive valve 53 is not opened by the suction pressure Ps at a start-up, theslide valve body 90 can open the through-holes 52d of the pressuresensitive valve member 52 to form the flow passage for the discharge of the fluid from the control chamber 4 to the suction chamber 3 via theintermediate communication passage 55. - Next, the operation during normal control will be described. During normal control, an opening degree or an opening time of the
main valve 50 is adjusted by duty control of the capacity control valve V, to control the flow rate of the fluid from thePd port 12 to thePc port 14. At this time, the receivingsurface 90c of theslide valve body 90 receives a flow of the fluid (shown by solid arrows inFIG. 3 ) from thePd port 12 to thePc port 14 which is generated by opening of themain valve 50, so that a force to move theslide valve body 90 to the left in the axial direction acts on the slide valve body 90 (shown by white arrows inFIG. 3 ), theslide valve body 90 moves to the left in the axial direction against the biasing force of thecoil spring 91, and the through-holes 52d of the pressuresensitive valve member 52 are closed by the axially left end portion of thebase portion 90a (refer toFIG. 3 ). - As described above, when the
slide valve body 90 closes the through-holes 52d of the pressuresensitive valve member 52 during normal control, since the flow passage to be formed by the control chamber 4, thePc port 14, the pressuresensitive chamber 40, the through-holes 52d, theintermediate communication passage 55, theauxiliary valve chamber 30, thePs port 13, and the suction chamber 3 is not formed, the rate of outflow of the refrigerant from the control chamber 4 to the suction chamber 3 is reduced, so that the operating efficiency of the variable displacement compressor M can be improved. - In addition, when the variable displacement compressor M is driven at the maximum capacity, the capacity control valve V is energized at a maximum duty, so that the
main valve 50 is closed and theslide valve body 90 is moved to the right in the axial direction to open the through-holes 52d of the pressuresensitive valve member 52 and to allow communication between thePc port 14 and thePs port 13. Therefore, the control pressure Pc can be quickly lowered. For this reason, thepistons 7 in thecylinders 4a of the control chamber 4 can be quickly variable, and the state of the maximum capacity can be maintained to improve the operating efficiency. - As described above, during normal control of the capacity control valve V, the through-
holes 52d of the pressuresensitive valve member 52 are closed, and at a start-up and at the time of a maximum capacity operation, theslide valve body 90 is moved to open the through-holes 52d of the pressuresensitive valve member 52, so that the operating efficiency of the variable displacement compressor M can be improved. - In addition, since the
coil spring 91 is disposed between theside surface 90f on the axially left side of theflange portion 90b of theslide valve body 90 and theside surface 52e on the axially right side of theflange portion 52c formed closer to a tip side than the through-holes 52d in the pressuresensitive valve member 52, namely, on the axially left side thereof, and thecoil spring 91 and the through-holes 52d of the pressuresensitive valve member 52 can be disposed at a position to overlap each other in the radial direction, the axial length of each of theslide valve body 90 and the pressuresensitive valve member 52 can be shortened, and the capacity control valve V can be compactly configured. - Specifically, for example, as in a modification example of the capacity control valve V shown in
FIG. 5 , since the axial length of aflange portion 190b of aslide valve body 190 and the axial length of abase portion 152b on an axially right side of through-holes 152d of a pressuresensitive valve member 152 can be more shortened than those of the embodiment, and the axial length of avalve housing 110 can be shortened accordingly, the capacity control valve V can be compactly configured. - In addition, since the
coil spring 91 is disposed in a state of being exposed to the pressuresensitive chamber 40, and it is difficult for thecoil spring 91 to be affected by the pressure of the fluid which is involved in the opening and closing of the through-holes 52d of the pressuresensitive valve member 52 by reciprocation of theslide valve body 90, the responsiveness of thecoil spring 91 is good. - In addition, an inner peripheral surface of the
slide valve body 90 is formed as a flush surface, in detail, formed in a cylindrical shape having a constant inner diameter in the axial direction, and slides on the outer peripheral surface of thebase portion 52b of the pressuresensitive valve member 52 in a range that is long in the axial direction, so that the slidability of theslide valve body 90 on the pressuresensitive valve member 52 can be enhanced. Further, since a radial dimension of a very small gap between the inner peripheral surface of theslide valve body 90 and the outer peripheral surface of thebase portion 52b of the pressuresensitive valve member 52 is set to be substantially constant, the amount of the fluid that slightly leaks to theintermediate communication passage 55 through the very small gap can be further reduced, so that the operating efficiency of the variable displacement compressor M can be further improved. - In addition, since the inner peripheral surface of the
slide valve body 90 is formed as a flush surface to prevent the pressure of the fluid to act in the axial direction, the fluid entering the very small gap between the inner peripheral surface of theslide valve body 90 and the outer peripheral surface of thebase portion 52b of the pressuresensitive valve member 52, even when a differential pressure is generated between the very small gap and the pressuresensitive chamber 40, the influence of the differential pressure can be suppressed and operation of theslide valve body 90 can be smoothly performed. - In addition, since an inner peripheral surface of the
slide valve body 90 is slidable on the outer peripheral surface of thebase portion 52b of the pressuresensitive valve member 52 in the axial direction, the movement of the fluid that slightly leaks to theintermediate communication passage 55 through the very small gap that is long in the axial direction can be stabilized, and particularly, it is difficult to affect an opening operation of the through-holes 52d performed by theslide valve body 90 using the biasing force of thecoil spring 91. - In addition, since the through-
holes 52d of the pressuresensitive valve member 52 are formed to penetrate through thebase portion 52b having a thin radial thickness in the axial direction, the radial length of the through-holes 52d is shortened, so that the fluid easily flows into theintermediate communication passage 55 from the pressuresensitive chamber 40 through the through-holes 52d, and the responsiveness of the variable displacement compressor M can be improved. - In addition, since the receiving
surface 90c of theslide valve body 90 faces the right in the axial direction where themain valve 50 is formed, in a non-energized state of the capacity control valve V, the receivingsurface 90c receives a flow of the fluid from thePd port 12 to thePc port 14 generated by opening of themain valve 50, a force to move theslide valve body 90 to the left in the axial direction easily acts thereon, and theslide valve body 90 is easily actuated. - In addition, since the receiving
surface 90c of theslide valve body 90 is tilted with respect to the reciprocating direction of the main andauxiliary valve body 51 and of theslide valve body 90, in a non-energized state of the capacity control valve V, a flow of the fluid from thePd port 12 to thePc port 14 is easily generated by opening of themain valve 50. - Further, inside the
valve housing 10, since theslide valve body 90 is disposed such that an outer peripheral surface of theslide valve body 90 including an axially right end portion of thebase portion 90a and the receivingsurface 90c on the axially right side of theflange portion 90b is close to an inner peripheral surface of theannular protrusion portion 10c at which themain valve seat 10a forming themain valve 50 is formed, a relatively narrow flow passage is formed between themain valve chamber 20 and the pressuresensitive chamber 40, so that a flow of the fluid from thePd port 12 to thePc port 14 is more easily generated by opening of themain valve 50. - In addition, since the
coil spring 91 that biases theslide valve body 90 toward the right in the axial direction is disposed on a back surface side of the receivingsurface 90c of theslide valve body 90, namely, on the axially left side of theflange portion 90b, theslide valve body 90 is reciprocatable in the axial direction with a simple structure. - In addition, until the
slide valve body 90 slides to the right in the axial direction by a predetermined distance or more from a state where theend surface portion 90e on the axially left side is in contact with theside surface 52e of theflange portion 52c of the pressuresensitive valve member 52, since theslide valve body 90 can maintain a state where the through-holes 52d of the pressuresensitive valve member 52 are closed by the axially left end portion of thebase portion 90a, even when theslide valve body 90 slightly slides due to disturbance such as vibration, the closed state of the through-holes 52d of the pressuresensitive valve member 52 is maintained. For this reason, the capacity control valve V is resistant to disturbance, and has good control accuracy. - In addition, since the main and
auxiliary valve body 51 and the pressuresensitive valve member 52 are separate bodies, and thestopper portion 51d that restricts a movement of theslide valve body 90 to the axially right side is formed in the main andauxiliary valve body 51, the axial movement of theslide valve body 90 can be restricted with a simple structure. - In addition, since the plurality of through-
holes 52d of the pressuresensitive valve member 52 are formed, a wide cross-sectional area of the flow passage for the discharge of the fluid from thePc port 14 to the suction chamber 3 can be secured. In addition, since the plurality of through-holes 52d are evenly disposed in a circumferential direction, the stroke of theslide valve body 90 can be shortened. - The embodiment of the present invention has been described above with reference to the drawings; however, the specific configurations are not limited to the embodiment, and changes or additions that are made without departing from the scope of the present invention are also included in the present invention.
- For example, in the embodiment, the slide valve body has been described as reciprocating relative to the pressure sensitive valve member in the axial direction; however, the present invention is not limited to the configuration and, for example, the slide valve body may reciprocate relative to the pressure sensitive valve member in the axial direction while rotating and sliding with respect to the pressure sensitive valve member.
- In addition, in the embodiment, an example has been described in which the main and auxiliary valve body and the pressure sensitive valve member are formed as separate bodies, but both may be integrally formed.
- In addition, the receiving surface of the slide valve body may be formed to be orthogonal to the reciprocating direction of the main and auxiliary valve body and of the slide valve body.
- In addition, the inner peripheral surface of the slide valve body may not be formed as a flush surface.
- In addition, the reciprocation of the slide valve body may be guided by the
adapter 70. - In addition, in the slide valve body, the base portion and the flange portion may be separately formed.
- In addition, in the pressure sensitive valve member, the base portion and the flange portion that is a support portion may be separately formed.
- In addition, the communication passage that provides direct communication between the control chamber 4 and the suction chamber 3 of the variable displacement compressor M, and the fixed orifice may not be provided.
- In addition, the
auxiliary valve 54 may not be provided, and it is sufficient that thestep portion 51b on the axially right side of the main andauxiliary valve body 51 functions as a support member that receives an axial load, and thestep portion 51b does not necessarily require a sealing function. - In addition, the pressure
sensitive chamber 40 may be provided on an axially right side of themain valve chamber 20 in which thesolenoid 80 is provided, and theauxiliary valve chamber 30 may be provided on an axially left side of themain valve chamber 20. - In addition, the
coil spring 91 is not limited to a compression spring, and may be a tensile spring or may be a spring having a shape other than a coil shape. - In addition, the
coil spring 91 may not face the pressuresensitive chamber 40. - In addition, the pressure
sensitive body 60 may not use a coil spring inside. - In addition, by means of duty control of the capacity control valve V, an opening degree or an opening time of the
main valve 50 may be adjusted to control the flow rate of the fluid from thePd port 12 to thePc port 14 and to adjust a movement amount of theslide valve body 90 to the left in the axial direction, and opening degree adjustment of the through-holes 52d of the pressuresensitive valve member 52 may be performed by the axially left end portion of thebase portion 90a of theslide valve body 90. Accordingly, the flow rate of the fluid flowing from thePc port 14 to thePs port 13 can be adjusted. -
- 1
- Casing
- 2
- Discharge chamber
- 3
- Suction chamber
- 4
- Control chamber
- 10
- Valve housing
- 10a
- Main valve seat
- 10c
- Annular protrusion portion
- 11
- Partition adjustment member
- 12
- Pd port (discharge port)
- 13
- Ps port (suction port)
- 14
- Pc port (control port)
- 20
- Main valve chamber
- 30
- Auxiliary valve chamber
- 40
- Pressure sensitive chamber
- 50
- Main valve
- 51
- Main and auxiliary valve body (valve body)
- 51c
- Through-hole
- 51d
- Stopper portion
- 52
- Pressure sensitive valve member
- 52a
- Pressure sensitive valve seat
- 52b
- Base portion
- 52c
- Flange portion (support portion)
- 52d
- Through-hole
- 52e
- Side surface
- 53
- Pressure sensitive valve
- 54
- Auxiliary valve
- 55
- Intermediate communication passage
- 60
- Pressure sensitive body
- 70
- Adapter
- 70a
- Axially right end
- 80
- Solenoid
- 90
- Slide valve body
- 90a
- Base portion
- 90b
- Flange portion
- 90c
- Receiving surface
- 90d
- End surface portion
- 90e
- End surface portion
- 90f
- Side surface
- 91
- Coil spring (biasing device)
- 110
- Valve housing
- 152
- Pressure sensitive valve member
- 152b
- Base portion
- 152d
- Through-hole
- 190
- Slide valve body
- 190b
- Flange portion
- M
- Variable displacement compressor
- V
- Capacity control valve
Claims (9)
- A capacity control valve comprising:a valve housing provided with a discharge port through which a discharge fluid of a discharge pressure passes, a suction port through which a suction fluid of a suction pressure passes, and a control port through which a control fluid of a control pressure passes;a main valve including a valve body driven by a solenoid, and a main valve seat which is provided between the discharge port and the control port and with which the valve body is contactable;a pressure sensitive body disposed in a pressure sensitive chamber; anda pressure sensitive valve member extending from the valve body to the pressure sensitive chamber and forming a pressure sensitive valve, together with the pressure sensitive body,wherein an intermediate communication passage is formed in the valve body and in the pressure sensitive valve member,the control port and the suction port are allowed to communicate with each other through the intermediate communication passage by opening the pressure sensitive valve,the pressure sensitive valve member is provided with a through-hole communicating with the intermediate communication passage and has a slide valve body attached thereto such that the slide valve body slides relative to the pressure sensitive valve member to open and close the through-hole, anda biasing device that biases the slide valve body in an opening direction is provided on a radially outer side of the slide valve body.
- The capacity control valve according to claim 1,
wherein the biasing device is disposed between the slide valve body and a support portion formed closer to a tip side than the through-hole in the pressure sensitive valve member. - The capacity control valve according to claim 1 or 2,
wherein the biasing device is disposed so as to be exposed to the pressure sensitive chamber. - The capacity control valve according to any one of claims 1 to 3,
wherein an inner peripheral surface of the slide valve body is formed as a flush surface. - The capacity control valve according to any one of claims 1 to 4,
wherein a receiving surface facing toward the main valve is formed in the slide valve body. - The capacity control valve according to claim 5,
wherein the receiving surface is tilted with respect to a reciprocating direction of the valve body. - The capacity control valve according to any one of claims 1 to 6,
wherein the slide valve body is disposed to be strokable in a closed state of the through-hole. - The capacity control valve according to any one of claims 1 to 7,
wherein the valve body and the pressure sensitive valve member are separate bodies, and a stopper portion that restricts a movement of the slide valve body toward the main valve is formed in the valve body. - The capacity control valve according to any one of claims 1 to 8,
wherein a plurality of the through-holes are formed in the pressure sensitive valve member.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2020076940 | 2020-04-23 | ||
PCT/JP2021/015598 WO2021215345A1 (en) | 2020-04-23 | 2021-04-15 | Capacity control valve |
Publications (2)
Publication Number | Publication Date |
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EP4141259A1 true EP4141259A1 (en) | 2023-03-01 |
EP4141259A4 EP4141259A4 (en) | 2024-04-10 |
Family
ID=78269280
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP21792456.2A Pending EP4141259A4 (en) | 2020-04-23 | 2021-04-15 | Capacity control valve |
Country Status (6)
Country | Link |
---|---|
US (1) | US20230167814A1 (en) |
EP (1) | EP4141259A4 (en) |
JP (1) | JPWO2021215345A1 (en) |
KR (1) | KR20220159471A (en) |
CN (1) | CN115427684A (en) |
WO (1) | WO2021215345A1 (en) |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007119380A1 (en) | 2006-03-15 | 2007-10-25 | Eagle Industry Co., Ltd. | Capacity control valve |
US10781804B2 (en) * | 2016-08-29 | 2020-09-22 | Eagle Industry Co., Ltd. | Displacement control valve |
US11326585B2 (en) * | 2017-12-25 | 2022-05-10 | Eagle Industry Co., Ltd. | Capacity control valve |
KR102352195B1 (en) * | 2018-02-27 | 2022-01-17 | 이구루코교 가부시기가이샤 | capacity control valve |
US11053933B2 (en) * | 2018-12-13 | 2021-07-06 | Eagle Industry Co., Ltd. | Displacement control valve |
EP4160016A1 (en) * | 2020-05-25 | 2023-04-05 | Eagle Industry Co., Ltd. | Capacity control valve |
-
2021
- 2021-04-15 WO PCT/JP2021/015598 patent/WO2021215345A1/en unknown
- 2021-04-15 EP EP21792456.2A patent/EP4141259A4/en active Pending
- 2021-04-15 JP JP2022517008A patent/JPWO2021215345A1/ja active Pending
- 2021-04-15 KR KR1020227038444A patent/KR20220159471A/en not_active Application Discontinuation
- 2021-04-15 US US17/920,008 patent/US20230167814A1/en active Pending
- 2021-04-15 CN CN202180029538.3A patent/CN115427684A/en active Pending
Also Published As
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KR20220159471A (en) | 2022-12-02 |
CN115427684A (en) | 2022-12-02 |
EP4141259A4 (en) | 2024-04-10 |
US20230167814A1 (en) | 2023-06-01 |
JPWO2021215345A1 (en) | 2021-10-28 |
WO2021215345A1 (en) | 2021-10-28 |
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